In order to overcome the limitation of traditional potato variety evaluation method, the comprehensive evaluation on potato varieties from Hubei potato variety regional test in 2019 was analyzed comprehensive by means of identical and different method. The result showed that the connection degree between 3 potato variety（Huashu6,08HB18-4 and Emalingshu17） was 0.8843, 0.7645, 0.7443, respectively. The comprehensive traits were excellent,so these varieties should be demonstrated and popularized. The other potato variety need to be observed and tested further. The analysis of similarity-difference connection trend could estimate the yield productivity and stability simultaneously. It could determine the advantage and disadvantage of potato variety comprehensively and accurately.